Factors of safety

- [Voiceover] Hi, I'm William Lidwell,…and this is the Universal Principles of Design.…In this movie,…factors of safety.…Or how to design for unknown unknowns.…On the night of May 22, 1903…students and staff of the Pennsylvania…electro-mechanical institute…in Pittsburgh,…prepared the Donnelly building…for thefir annual banquet and ball.…Festivities are to be held on the…fifth and sixth floors,…dancing on five,…and dining on six.…

More than 700 people will attend.…The building elevator is expected to get a workout.…So, two days prior the elevator engineer…performs maintenance to make sure it's up for the event.…He tightens a few bolts and fixes up the brakes.…Everything appears to be in working order.…Elevators in those days,…worked pretty much like they do today.…You have cable pulley system.…With a passenger car on one side,…and counterweights on the other.…The counterweights keep the loads in near equilibrium,…minimizing the work the motors need to do…to move a car up and down.…

Around 10 PM that evening,…anxious to join the party on the sixth floor,…

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Author

Updated

7/19/2017

Released

7/15/2015

Design is full of unspoken rules and obscure theories that, when applied, can dramatically improve one's own design. For the first time, we are documenting them all in one place. Universal Principles of Design, based on William Lidwell's award-wining books, illustrates one design principle every other week, ranging from the tried and true (the 80/20 rule) to concepts that you may not have ever heard in a design context (Ockham's razor or crowd intelligence.) These principles are critical to successful design—no matter what the discipline. Anyone who creates, designs, engineers, or illustrates will learn invaluable lessons that will take their work to the next level.

Skill Level Appropriate for all

5h 29m

Duration

1,030,206

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Q: Why can't I earn a Certificate of Completion for this course?

A: We publish a new tutorial or tutorials for this course on a regular basis. We are unable to offer a Certificate of Completion because it is an ever-evolving course that is not designed to be completed. Check back often for new movies.